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The 72 LT1 in stock form maxed at 255 HP with 280 ft. lbs. torque. This at 9.0:1 compression. The 400 came in at 170 HP and the 402 at 210 HP.
I have added an Edelbrock Performer, HEI, lifter valley baffle, crank scraper, 2.5" Ramhorns, undercut and swirl polished stainless valves, roller rockers in the 442 heads and a few other items. Everything should look like it belongs there with the exception of the intake. The HEI will hide behind the stock breather (which will have a K&N inside). I am also running the stock valve covers. You will never see the ported heads or roller rockers. The Ramhorns look just like the stock 2".
I wanted a fair HP engine with good torque for the 4x4. This should work nicely.
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72 3/4 4x4 350 4spd
72 3/4 4x4 350 auto
2004 Duramax Silverado 4x4
2006 Duramax Crew cab 4x4
2010 Harley Ultra Limited
2011 Harley Street Glide
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